Malicious PDF — malware analysis report

Static analysis result for SHA-256 11d919e1bcc4714f…

MALICIOUS

PDF

75.7 KB Created: 2021-03-09 18:52:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6ee453d713e9f2d0437c3d59cec24465 SHA-1: 37ecf8b960a477ea8969261f7afac1c065cff8b0 SHA-256: 11d919e1bcc4714f14f35d0b6a90c254251e31d1b000dd0b8533df9a6f68cd32
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many pointing to disposable hosting, and includes a URL that appears to be a lure for 'sonata service center near me'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jacksth.ru/aws?utm_term=sonata+service+center+near+me PDF link annotation
    • http://malespw.xyz/hp_elitedesk_800_g1_sff_datenblatt33l3v.pdfIn PDF document text
    • http://1s.london/file_manager_pro_apk_androidp7hfg.pdfIn PDF document text
    • http://mangalvpodarok.ru/build_guide_for_mobile_legendsgiw1v.pdfIn PDF document text
    • http://mklhhhh.space/97938172251apc04.pdfIn PDF document text
    • http://about-central.com/26100716777ao75n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_06dac3fa8ed44815b2859b0a9225a95c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xeroguru/26201827732.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/kukiwexerigoni.pdfIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_49fa3587fe0444758d528bdf31c7e3e1.pdf?index=trueIn PDF document text
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_5e550c34756e4e0d871b77c046d0b179.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb9843df-c149-4147-aea4-560c44dba195/links_awakening_bottle_grotto_stuck.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0502bdbc-342b-4c17-a06c-39b4ee3a1333/my_samsung_washer_keeps_going_off_balance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70a708bd-eadf-44ca-8312-fbfc1513e583/best_daily_english_words_app.pdfIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_f45f6bf2442b452e9a4ba5b4ad009913.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/006f8646-f47f-44bf-8636-a7adeff097a8/ion_block_rocker_plus_review.pdfIn PDF document text
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_2ef50628f456445a90cc780740aabd8c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/235fb31d-6aeb-4530-84b7-fbc105ae70d7/67454548672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/625f8ff9-8a66-4596-8a18-e52c6bad0844/51899223544.pdfIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_7538e8323d9a4e04ab66c69a7ff79bc4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/268a3867-282f-4938-8f5b-f3544d816389/brother_pt-d400_manual.pdfIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_71bee0dc96a34937b358c2378259ac47.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a5ade98-6762-46af-b0bb-30cb97e9a3f2/manelukonobu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDA 5076 bytes
SHA-256: 1bfd9efec1001ab31aa6f70a6b83eafe7642c5840e2f3f93fdda982d7f269927
font_01_sfnt_off0000fd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0B 10772 bytes
SHA-256: 6ed35cf551841cca9744efd50ff6916bf9867707bcd66d2fec5c4855e31315ec